package com.lin.gulimall.product.service.impl;

import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.lin.gulimall.common.constant.ProductConstant;
import com.lin.gulimall.common.utils.Query;
import com.lin.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.lin.gulimall.product.dao.AttrGroupDao;
import com.lin.gulimall.product.dao.CategoryDao;
import com.lin.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.lin.gulimall.product.entity.AttrGroupEntity;
import com.lin.gulimall.product.entity.CategoryEntity;
import com.lin.gulimall.product.service.CategoryService;
import com.lin.gulimall.product.vo.AttrGroupRelatinVo;
import com.lin.gulimall.product.vo.AttrRespVo;
import com.lin.gulimall.product.vo.AttrVo;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.lin.gulimall.common.utils.PageUtils;
import com.lin.gulimall.common.utils.R;

import com.lin.gulimall.product.dao.AttrDao;
import com.lin.gulimall.product.entity.AttrEntity;
import com.lin.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Autowired
    AttrAttrgroupRelationDao relationDao;

    @Autowired
    AttrGroupDao attrGroupDao;

    @Autowired
    CategoryDao categoryDao;

    @Autowired
    CategoryService categoryService;

    @Autowired
    AttrDao attrDao;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional
    @Override
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        // 为了更方便赋值，可以使用spring提供的BeanUtils.copyProperties()方法赋值
        BeanUtils.copyProperties(attr,attrEntity);
        // 1 保存基本数据
        attrDao.insert(attrEntity);
        // 2 保存关联关系
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId() != null) {
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = new AttrAttrgroupRelationEntity();
            attrAttrgroupRelationEntity.setAttrId(attrEntity.getAttrId());
            attrAttrgroupRelationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationDao.insert(attrAttrgroupRelationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
                .eq("attr_type","base".equalsIgnoreCase(type)
                        ?ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode():ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());

        if (catelogId != 0) {
            queryWrapper.eq("catelog_id", catelogId);
        }

        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            queryWrapper.eq("attr_id", key).or().like("attr_name", key);
        }
        IPage<AttrEntity> iPage = this.page(new Query<AttrEntity>().getPage(params),queryWrapper);
        PageUtils pageUtils = new PageUtils(iPage);
        List<AttrEntity> attrEntityList = iPage.getRecords();
        List<AttrRespVo> attrRespVoList = attrEntityList.stream().map(attrEntity -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity, attrRespVo);

            // 1 设置分类和分组的名字
            if ("base".equalsIgnoreCase(type)) {
                AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = relationDao.selectOne(
                        new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId())
                );
                if (attrAttrgroupRelationEntity != null && attrAttrgroupRelationEntity.getAttrGroupId() != null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrAttrgroupRelationEntity.getAttrGroupId());
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }

            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());

        pageUtils.setList(attrRespVoList);
        return pageUtils;
    }

    // 通过属性id查询详细信息
    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();
        AttrEntity attrEntity = attrDao.selectById(attrId);
        BeanUtils.copyProperties(attrEntity, attrRespVo);

        // 只有基本属性才能去设置分组信息 因为销售信息不需要
        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            // 1 设置分组信息
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = relationDao.selectOne(
                    new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
            if (attrAttrgroupRelationEntity != null) {
                attrRespVo.setAttrGroupId(attrAttrgroupRelationEntity.getAttrGroupId());
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrAttrgroupRelationEntity.getAttrGroupId());
                if (attrGroupEntity != null) {
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }
        // 2 设置分类信息
        Long catelogId = attrEntity.getCatelogId();
        Long[] catelogPath = categoryService.findCatelogPath(catelogId);
        attrRespVo.setCatelogPath(catelogPath);
        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if (categoryEntity != null) {
            attrRespVo.setCatelogName(categoryEntity.getName());
        }
        return attrRespVo;
    }

    /**
     * 根据分组id查找关联的所有基本属性
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        List<AttrAttrgroupRelationEntity> entityList = relationDao.selectList(
                new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));
        List<Long> attrIds = entityList.stream().map(relationEntity -> {
            return relationEntity.getAttrId();
        }).collect(Collectors.toList());

        // 说明该分组没关联属性
        if (attrIds == null || attrIds.size() == 0) {
            return null;
        }

        List<AttrEntity> attrEntityList = attrDao.selectBatchIds(attrIds);
        return attrEntityList;

    }

    // 删除关联信息 需要两个属性 因为是多对多 容易删错
    @Override
    public void deleteRelation(AttrGroupRelatinVo[] vos) {
        List<AttrGroupRelatinVo> attrGroupRelatinVos = Arrays.asList(vos);

        List<AttrAttrgroupRelationEntity> entityList = attrGroupRelatinVos.stream().map(attrGroupRelatinVo -> {
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(attrGroupRelatinVo, attrAttrgroupRelationEntity);
            return attrAttrgroupRelationEntity;
        }).collect(Collectors.toList());

        relationDao.deleteBatchRelation(entityList);
    }

    /**
     * 获取当前分组没有关联的所有属性
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
        // 当前分组只能关联自己所属的分类里面的所有属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();
        // 2 当前分组只能关联别的分组没有引用的属性
        // 2.1 当前分类下的其他分组
        List<AttrGroupEntity> attrGroupEntities =
                attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
        List<Long> groupIds= attrGroupEntities.stream().map(item -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());

        // 2.2 这些分组关联的属性
        List<AttrAttrgroupRelationEntity> attrgroupRelationEntityList = relationDao.selectList(
                new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", groupIds)
        );
        List<Long> attrIds = attrgroupRelationEntityList.stream().map(item -> {
            return item.getAttrId();
        }).collect(Collectors.toList());

        // 2.3 从当前分类下的所有属性移除这些属性
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>()
                .eq("catelog_id", catelogId).eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());

        if (attrIds != null && attrIds.size() > 0) {
            wrapper.notIn("attr_id", attrIds);
        }
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            wrapper.and(w -> {
                w.eq("attr_id", key).or().like("attr_name", key);
            });
        }

        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);
        PageUtils pageUtils = new PageUtils(page);
        return pageUtils;

    }

    @Transactional
    @Override
    public void updateAttr(AttrVo attrVo) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attrVo, attrEntity);
        this.updateById(attrEntity);

        if (attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) {
            // 1、修改分组关联
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationEntity.setAttrGroupId(attrVo.getAttrGroupId());

            Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>()
                    .eq("attr_id", attrEntity.getAttrId()));

            if (count > 0) {
                relationDao.update(relationEntity, new UpdateWrapper<AttrAttrgroupRelationEntity>()
                        .eq("attr_id", attrEntity.getAttrId()));
            } else {
                relationDao.insert(relationEntity);
            }
        }
    }
}